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Related Parties - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Related Party Transaction [Line Items]      
Subordinated Borrowings $ 22,550us-gaap_SubordinatedDebt   $ 22,550us-gaap_SubordinatedDebt
Other Assets [Member]      
Related Party Transaction [Line Items]      
Employee compensation arrangement 11,574us-gaap_DueFromRelatedPartiesNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
  10,484us-gaap_DueFromRelatedPartiesNoncurrent
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
Investment Management [Member] | Private Equity Fund [Member]      
Related Party Transaction [Line Items]      
Revenue from related parties $ 1,213us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= evr_InvestmentManagementMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= evr_PrivateEquityFundMember
$ 1,145us-gaap_RevenueFromRelatedParties
/ dei_LegalEntityAxis
= evr_InvestmentManagementMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= evr_PrivateEquityFundMember